package com.j;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;



/**
 * Servlet Filter implementation class CharacterEncodingFilter
 */
public class CharacterEncodingFilter implements Filter {

	String characterEncoding;
	boolean enabled;
	
	
    /**
     * Default constructor. 
     */
    public CharacterEncodingFilter() {
        // TODO Auto-generated constructor stub
    }


    public void init(FilterConfig fConfig) throws ServletException {
    	// TODO Auto-generated method stub
    	characterEncoding= fConfig.getInitParameter("characterEncoding");
    	enabled = "true".equalsIgnoreCase(fConfig.getInitParameter("enabled").trim());
    	
    	
    }
	
	/**
	 * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
	 */
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		// TODO Auto-generated method stub
		// place your code here

		// pass the request along the filter chain
		if (enabled || characterEncoding!=null){
			request.setCharacterEncoding(characterEncoding);

		}
		
		chain.doFilter(request, response);
	}

	/**
	 * @see Filter#init(FilterConfig)
	 */

	public void destroy() {
		// TODO Auto-generated method stub
		characterEncoding = null;
		
		
		
	}

	/**
	 * @see Filter#destroy()
	 */
}
